The eyes are red and show congestion of the bulbar conjunctiva. The secretions are mainly exudates from the subepithelium of the conjunctiva, with mucus, tears, epithelial cells, white blood cells or pathogenic bacteria as the main components. Common secretions include aqueous, mucus-like, purulent, and filiform secretions. Ocular congestion with secretions is mostly caused by inflammation of the conjunctiva. Including infectious and non-infectious conjunctivitis, the eyes are congested with aqueous and mucus-like secretions, accompanied by infection of the upper respiratory tract and swollen lymph nodes in front of the ear, the first consideration is caused by viruses; patients with itchy and uncomfortable eyes, accompanied by filiform secretions, are considered to be allergic conjunctivitis, which can be accompanied by allergic constitution, or allergic rhinitis, patients with large amounts of purulent secretions; the amount of secretions in the morning when they get up It is mostly caused by bacterial infection; patients with chronic conjunctivitis have foreign body sensation, burning sensation, chronic congestion of the eyes, and mostly white foamy discharge.